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STMicroelectronics MP23AB02BTR
- Part No.:
- MP23AB02BTR
- Manufacturer:
- STMicroelectronics
- Category:
- Microphones
- Package:
- Datasheet:
-
MP23AB02BTR.pdf
- Description:
- MIC MEMS ANALOG OMNI -38DB
- Quantity:
- Payment:
- Shipping:
Inventory:4,639
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Product details
Overview
MP23AB02BTR from STMicroelectronics is a high-performance analog bottom-port MEMS audio sensor microphone with omnidirectional sensitivity, 64 dBA signal-to-noise ratio, -38 dBV/Pa typical sensitivity at 1 kHz, and operation from 1.6 V to 3.6 V supply. It delivers low-power audio capture in compact consumer voice interfaces and portable recording systems.
For engineers reviewing the MP23AB02BTR datasheet, MP23AB02BTR pinout, MP23AB02BTR application, or MP23AB02BTR equivalent, key selection criteria include acoustic overload point (125 dBSPL), A-weighted SNR, temperature range (-40 °C to +85 °C), reflow-compatible RHLGA package, and analog output interface compatibility with ADC front-ends.
Technical Context
The MP23AB02BTR integrates a silicon micromachined sensing element with on-chip analog signal conditioning. Its electrical interface is single-ended analog output referenced to Vdd/2, requiring external biasing via resistor divider for DC-coupled ADC input.
It operates across 20 Hz–20 kHz bandwidth with flat frequency response ±2 dB, supports 94 dBSPL input with <0.5% THD, and exhibits 125 dBSPL acoustic overload point-enabling robust performance in noisy environments without clipping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.6 V to 3.6 V - enables direct integration with 1.8 V or 3.3 V system rails without LDO |
| Current Consumption | 150 µA typical - supports multi-day battery life in always-on voice wake-up applications |
| Sensitivity | -38 dBV/Pa typ. at 1 kHz - provides sufficient output level for 16-bit ADCs without gain stage |
| SNR | 64 dBA A-weighted - ensures clear voice capture in ambient noise up to 40 dBA |
| Acoustic Overload Point | 125 dBSPL - prevents distortion during loud transients like claps or speaker feedback |
| Operating Temperature | -40 °C to +85 °C - validated for automotive cabin and industrial edge device deployment |
| Bandwidth | 20 Hz to 20 kHz ±2 dB - preserves full speech and audio fidelity for voice assistant use |
Pinout & Package
RHLGA metal cap 3-lead package measuring 3.35 × 2.5 × 0.98 mm, compliant with Pb-free reflow soldering (peak 260 °C), ECOPACK®-compliant, and qualified for extended temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Analog Output | Single-ended AC-coupled voltage output centered at Vdd/2; requires external DC-blocking capacitor before ADC |
| 2 | Power Supply (Vdd) | Primary power input; decoupling capacitor (≥1 µF) required adjacent to pin for noise immunity |
| 3 | Ground (GND) | Reference return path for internal amplifier and sensing element; must connect to low-impedance system ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Omnidirectional acoustic response | Uniform 360° pickup pattern enables flexible PCB placement without directional alignment constraints |
| Low-profile RHLGA package | 0.98 mm height allows integration into ultra-thin wearables and slim smartphones |
| High SNR with low distortion | 64 dBA SNR and <0.5% THD at 94 dBSPL ensure clean voice data for ASR engines |
| Extended temperature operation | Validated performance from -40 °C to +85 °C supports deployment in automotive infotainment and outdoor IoT nodes |
| Reflow-solder compatible | Qualified per JEDEC J-STD-020D; withstands peak 260 °C for ≤40 sec without performance degradation |
Applications
| Voice Assistant Endpoint | Smart Headset Audio Capture |
|---|---|
Use Scenario: Always-on keyword detection and far-field voice command acquisition in smart speakers and home hubs. IC Role / Device Role / Timing Role: Analog audio sensor providing continuous low-power acoustic monitoring with high SNR and wide dynamic range. Use Value: Enables reliable wake-word detection at 1 m distance in 50 dBA ambient noise due to 64 dBA SNR and 125 dBSPL overload headroom. | Use Scenario: Dual-microphone beamforming in Bluetooth headsets for noise-suppressed call uplink. IC Role / Device Role / Timing Role: Bottom-port analog MEMS microphone paired with companion top-port unit for spatial audio processing. Use Value: Identical sensitivity and phase matching across units support coherent beamforming algorithms without calibration overhead. |
| Industrial Voice-Controlled HMI | Portable Medical Voice Logger |
Use Scenario: Hands-free machine control in factory environments with intermittent high-noise events (e.g., pneumatic tools). IC Role / Device Role / Timing Role: Robust acoustic input transducer operating continuously across -40 °C to +85 °C industrial temperature range. Use Value: Maintains <0.5% THD at 94 dBSPL and survives 125 dBSPL transients, preventing clipped audio during equipment activation. | Use Scenario: Battery-powered voice diaries for clinical documentation in ambulatory care settings. IC Role / Device Role / Timing Role: Low-power analog microphone enabling >72-hour continuous recording on coin-cell battery. Use Value: 150 µA typical current draw and 1.6 V minimum supply allow direct connection to buck-boost regulators without intermediate LDO. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog MEMS microphone applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INVENSENSE ICS-43432 | Lower SNR (61 dBA), higher sensitivity (-32 dBV/Pa), digital I²S output | Requires I²S-capable MCU; lacks analog flexibility for legacy ADC interfaces | Select when digital interface and lower power (130 µA) outweigh need for analog simplicity |
| TDK INMP522 | Higher SNR (65 dBA), same analog output, but narrower temp range (-30 °C to +85 °C) | Not rated for automotive under-hood or industrial cold storage use | Select when maximum SNR is critical and operating environment stays above -30 °C |
Compared with ICS-43432 and INMP522, MP23AB02BTR uniquely balances 64 dBA SNR, -40 °C rating, and analog output in a 0.98 mm profile-making it optimal for space-constrained, thermally demanding voice endpoints where ADC interface flexibility is required.
Availability
MP23AB02BTR is available at Aetrix Electronics and suitable for voice assistant endpoints, smart headset audio capture, and industrial voice-controlled HMIs requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.
Supply support for MP23AB02BTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, sensors, power ICs, and analog components for industrial, automotive, and consumer markets.
The MP23AB02BTR belongs to ST's MEMS audio sensor product line, engineered specifically for high-fidelity, low-power analog voice capture in battery-operated and thermally challenging embedded systems.
FAQ
What is the recommended external biasing network for MP23AB02BTR?
A resistor divider (R1/R2) between Vdd and GND sets the output DC bias at Vdd/2, with C1 (>1 µF) blocking DC offset before the ADC. C2 (~1000 pF) filters RF noise, and C3 (1 µF) stabilizes the internal reference. Values must match layout guidelines in Figure 3 of the datasheet to avoid oscillation or reduced SNR.
Does MP23AB02BTR require an external clock or digital interface?
No. MP23AB02BTR is an analog-output MEMS microphone with no clock input or digital pins. It produces a continuous AC-coupled voltage signal proportional to sound pressure, requiring only Vdd, GND, and a load resistor or ADC input impedance for operation.
Can MP23AB02BTR be used in waterproof or dustproof enclosures?
The MP23AB02BTR has a bottom-port design with an integrated acoustic membrane, but it is not IP-rated. For sealed enclosures, a vented membrane or acoustic port must be provided to maintain acoustic coupling; direct sealing blocks sound transmission and degrades sensitivity by >20 dB.
How does the 125 dBSPL acoustic overload point impact system-level design?
The 125 dBSPL overload point defines the maximum continuous sound pressure before clipping occurs. In system design, this allows placement near loudspeakers or machinery without signal distortion, eliminating need for automatic gain control (AGC) in many voice UI applications and simplifying firmware architecture.
MP23AB02BTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- MEMS (Silicon)
- Output Type:
- Analog
- Direction:
- Omnidirectional
- Frequency Range:
- 20 Hz ~ 20 kHz
- Sensitivity:
- -38dB ±3dB @ 94dB SPL
- S/N Ratio:
- 64dB
- Impedance:
- -
- Voltage - Rated:
- 1.8 V
- Voltage Range:
- 1.6 V ~ 3.6 V
- Current - Supply:
- 220 µA
- Port Location:
- Bottom
- Ratings:
- -
- Termination:
- Solder Pads
- Size / Dimension:
- 0.132" L x 0.098" W (3.35mm x 2.50mm)
- Height (Max):
- 0.043" (1.08mm)
- Shape:
- Rectangular
- Grade:
- -
- Qualification:
- -
MP23AB02BTR FAQ
1.How can I place an order for MP23AB02BTR through Aetrix?
Please submit a Request for Quotation (RFQ) for MP23AB02BTR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MP23AB02BTR reliable?
The price and inventory of MP23AB02BTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP23AB02BTR is usually 5 days.
3.What payment methods are accepted for MP23AB02BTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP23AB02BTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP23AB02BTR?
MP23AB02BTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP23AB02BTR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MP23AB02BTR?
For technical support, including MP23AB02BTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP23AB02BTR requirements.
6.How does Aetrix verify that MP23AB02BTR is sourced from the original manufacturer or authorized distributors?
All MP23AB02BTR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MP23AB02BTR meets industry standards.
7.What is the process for return or replacement of MP23AB02BTR?
All MP23AB02BTR units undergo pre-shipment inspection (PSI). If there is an issue with MP23AB02BTR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MP23AB02BTR part is unused and in its original packaging.
Return procedure for MP23AB02BTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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